Pump



Dec. 21, 1937. ALLEN 2,192,665

PUMP

Filed May 14, 1934 iIE] E.

Herbert 4lln I FIQE. v HvI/ENoR.l

Y www@ A TTORNE Y.

Patented Dec. 21, 1.937

PATENT OFFICE PUMP Herbert Allen, Houston, Tex., assignor, by mesne assignments, to Abercrombie Pump Company, Houston, Tex., a corporation of Texas Application May 14, 1934, Serial No. 725,567

14 Claims.

This invention relates generally to pumps. It will be found particularly useful in pumps designed for pumping abrasive and corrosive fluid of the general type disclosed by Letters Patent of `the United States to Stephens' No. 1,848,441 of March 8, 1932. A conventional pump of this type adapted for use as a mud or slush pump in deep 'well drilling includes a barrel; inlet and outlet valves therefor; a hollow expansible member within the barrel, and a reciprocable piston to actuate pumping fluid confined within the expansible member to cause expansion and contraction thereof whereby pumped uid is drawn into and forced out of said barrel. In pumps of other typesy the pumped fluid is in contact with the piston and rod andy carries away the heat generated by the reciprocation of the piston and rod through conventional packings. In the type of pump to which this inveno tion relates, however, the piston and rod are sealed off from the fluid being pumped and the heat so generated is therefore transferred to the pumping fluid within the expansible member. These expansible members are usually made of rubber, which is a very good heat insulator, and the pumping fluid within the expansible member is in contactA with very little metal. Under certain conditions, such as when the packings are inadvertently made too tight, the heat is not dissipated as rapidly as it is generated. And so, under such conditions, the pumping fluid in the expansible member will reach a very high temperature whereby the expansible member will be injured; and when the preure on the pumping fluid is reduced on the suction` stroke of the piston, the pumping fluid will boil :so ,that the pumping member will remain expanded, which renders Y the pump inoperative.

'Ihis invention has for its general object the provision of new and improved means to prevent heating of the pumping fluid to an objectionably high temperature.

The pumped fluid is in most instances at a low l enough temperature to be used as a cooling medi- 45 um and this invention has for one of its specific l objects the utilization thereof as such, the heat of the pumping fluid being transferred by the means provided to the pumped fluid.

A- furtherspeciflc object of the invention is to provide a new `and improved hollow pumping member, the expansible part only of which need be replaced upon failure thereof.

Other objects will hereinafter appear.

In the accompanying drawing wherein the preferred embodiments of the invention are illus- (c1. s-44,) e

trated, Fig. 1 is a fragmentary sectional elevation of a pump with one embodiment of the pumping member therein; Fig. 2, a sectional elevationof another embodiment of the pumping member; and Figs. 3 and 4, fragmentary sec- 5 tional and fplan views of 4a modification of the metal insertsof the embodiment shown by Fig. 2.

As the operation of pumps of this type is clearlyl set forth in said patent to Stephens 1,848,441, it will be but briefly referred to herein as follows: l0

A In the drawing the barrel is indicated at I',- and the inlet and outlet means at 2 and 3, the latter including valves not shown. Within the barrel I is the pumping member 4, and reciprocable through packings of any conventional l5 type is the piston oilplunger 5 which serves to actuate the pumping fluid confined within the member 4 to effect the' expansion and contraction of the latter to draw the pumped fluid into the barrel I through the inlet means 2, and to expel it from the barrel I through the outlet means 3.

Now it will be observed that the pumping member 4 is made in two sections, one section 4a of which is of'rubber, and the other section 4b of 25 which is of metal,v the two sections being connected by suitable means such as that `indicated at 6. The rubber section 4a has on its end an internal annular flange I held in sealing engagement with one end of the barrel I by the ring 8. The metal section 4b has an external annular flange I8 which is secured to the other end wall of the barrel `I by the ring 9.' On either side of the flange I8 may be placed sealing gaskets I0 and Il.

The means whereby the ends of the pumping member 4 are sealed to the barrel I, and the piston 5 is packed, may, of course, be variedwithout departing from the present invention. The construction herein disclosed for that purpose 40 forms the subject matter of another application, Serial No. 733, 079, filed June 29, 1934.

Now when the piston or plunger 5 is at the end of its suction stroke, as shown by the drawing,vthe shape of thepumping member 4 is sub- 45 stantially cylindrical and the barrel I is filled with pumped fluid. When the piston 5 moves to the right onits discharge stroke, it displaces the pumping fluid in the rubber section 4a. of the pumping member and causes said section4a to 50 expand. During such expansion the inlet valve (not shown) of the means 2 remains closed and the outlet valve (not shown) of the means 3 opens to permit the pumped fluid to be expelled rfrom the barrel I through the outlet means L -And when the piston moves to the left on its suction stroke back into its position vshown by the drawing, the section 4a.` of the pumping member contracts; and as the valve (not shown) the valve (not shown) of the inlet means 2 opens, a fresh charge of pumped fluid is thereby drawn into the barrel I. It will be obvious that as the piston 5 reciprocates the pumped fluid willA be alternately drawn .into and expelled from the barrel.

The heat generated by the plunger in the pumping fluid will obviously be transferred through the heat conducting metal section 4b into the pumped fluid; and when the rubber section 4a fails, it may be replaced and the originall metal section 4b used with the new rubber section.

Referring now to Fig. 2 in this embodiment, the pumping member 9 is preferably made of rubber, and has an internal annular flange I0 at one end,

and an external annular ange Il at the other.

In this member a lnumber of metal inserts l2 are embedded. These inserts l2 pass through the sleeve and have internal and external caps to form efficient heat transferring elements to eect the transfer of the heat of the pumping fluid to the pumped fluid.

In Figs. 3 and 4 a modification of the inserts I2 is indicated at I 2a. In this form the inserts I2a are corrugated to provide alarger area for heat transfer.

This invention is not limited to thepreferred embodiments herein disclosed. Various changes will occur to those skilled in the art, and may be made within the scope of the following claims.

I claim;

1. A pump having a barrel; inlet and outlet means for said barrel; a hollow pumping member in said barrel; said member being substantially cylindrical, and made in separable sections; each of said sections being connected to one of the end walls of said barrel; one of said sections being made of rubber and the other of said sections being made of metal; pumping fluid in said mmber;.and means to actuate said pumping fluid to effect the expansion and contraction of said rubber section to draw pumped fluid into said barrel through said inlet means and to expel it from said barrel through saidoutlet means; said metal section `serving to eiect the transfer of heat from said pumping fluid to said pumped fluid.

2. A pump having a barrel; inlet and outlet means for said barrel; a hollow pumping member in said barrel; said member being made in separable sections; each of said sections being connected to one of the end walls of said barrel; one

of said sections being made of rubber and the' `efl'ect the transfer of heat from ,said pumping fluid to said pumped fluid.

3. A pump having a barrel; inlet and outlet means for said barrel; a hollow close pumping `member in said barrel; said member being made 1n sections; one of said sections being made of rubber and the other of said sections being made of metal; pumpingr fluid in said member; andv means to actuate said pumping fluid to effect the expansion and contractionof said rubber section to draw pumped uid into said barrel through from said barrel through said outlet said inlet means and to expel it from said barrel through 'said outlet means; said metal sectionv 'serving to effect the transfer of heat from said pumping fluid to said pumped fluid. of the outlet means 3 then remains closed, and

45A pump having a barrer; inlet and outlet means for said barrel; a hollow expansible pumpf ing member in lsaid barrel; pumping fluid in said vthrough said inlet means, and to expel vit from said barrel through said outlet means; said member being closed and made of. rubbr and having openings therein, and' corrugated metal inserts in saidY -openings to-transfer the heat fromsaid pumping fluid to said pumped fluid. i

5. A pump having a'barrel; inlet andV outlet means for said barrel; a hollow expansible pumping member sealed in s aid barrel; pumping fluid in said member; and means to actuate said pumping fluid to effect the expansion and contraction of said member to draw pumped uid intosaid barrel through said inlet means, and to expel it means;l said member being made of rubber and having metal inserts embedded therein and extending therethru to transfer the heatfrom said pumping fluid to said pumped fluid.

6. A pump having a barrel; inlet and outlet means for said barrel; a hollow expansible pumping member in said barrel; pumping fluid in said member; and means to actuate said pumping fluid to effect the expansion and contraction of said member to draw pumped fluid into said barrel through said inlet means, and -to expel it from said barrel through said outlet means.; said mem- .ber being made of rubber and having metalinserts therein to transfer the heat from said pumping uid to said pumped fluid.

7. A hollow expansible pumping member adapted to separate two uids o1' dierent character, said member having a body of rubber with heat transferring metal inserts embedded therein each of said inserts having portions thereof exposed to both the interior and the exterior of said member.

l 8. A hollow expansible pumping member having a body of rubber with openings therein and corrugated heat transferring metal inserts in said openings each of said inserts 4having parts exposed to both the interior and the exterior of said member.

9. A hollow pumping member' having a substantially cylindrical rubber section tially cylindrical heat transferring metal section joined to and forming a continuation of said rubber section.

10. A pump having a barrel, inlet andoutlet means for said barrel, a hollow pumping member in said barrel, said member g substantially cylindrical and connected to theend walls of said barrel, one portion of said member being made Iof rubber and another portion of said member being made of metal, pumping fluid in said member, and means to actuate said pumping-fluid to effect the expansion and contraction of said :rubber portion to draw pumped fluid into said barrel through said inlet means and to expel it from said barrel through said outlet means, said metal portion serving -to effect the transfer of heat from said pumping fluid to said pumped fluid.

1l. A pump having a barrel, inlet and outlet means for said barrel, a hollow pumping member sealed in said barrel, said member being expansible, pumping fluid in said member,and means yto and a Substanmoineaux actuate said pumping uld to eiect the expansion and contraction of said member to draw pumped uid into said barrel through said inlet means and to expelv it from said barrel through said outlet means, said pumping member consisting in part of heat transferring material, and the part consisting of heat transferring material being arranged to eiect the transfer of heat from said pumping fluid to said pumped uid.

12. A hollow expansibie pumping member adapted to confine a pumping uid and be im-` mersed in a fluid to be pumped, said member having a body of rubber with heat transferring metaiinserts imbedded therein and extending from the interior to the exterior of the expansible portion thereof.

13. The combination with a reciprocable plunger, of a fixed hollow pumping member surrounding the same and adapted to contain a pumping -iiuid and be immersed in a fluid to be pumped,

posite surfaces of said member and positioned to 15 be exposed to both of said uids. e

HERBERT ALLEN. 

